3−5

PCI1510

(PC Card

Controller)

12 V

Power Supply

PP1

PP2

PC Card

TPS2211A

5 V

3.3 V

VCCD0

12V

3.3V

AVPP

AVCC

Supervisor

SHDN

VCCD1

VPPD0

VPPD1

Figure 3−3. TPS2211A Typical Application

3.5.3 Zoomed Video Support

The controller allows for the implementation of zoomed video (ZV) for PC Cards. Zoomed video is supported by

setting bit 6 (ZVENABLE) in the card control register (PCI offset 91h, see Section 4.32). Setting this bit puts 16-bit

PC Card address lines A25−A4 of the PC Card interface in the high-impedance state. These lines can then transfer

video and audio data directly to the appropriate controller. Card address lines A3−A0 can still access PC Card CIS

registers for PC Card configuration. Figure 3−4 illustrates a ZV implementation.

CRT

VGA

Controller

Audio

Codec

PCI1510

19 4

Zoomed Video

Port

PCM

Audio

Input

PCI Bus

PC Card

Interface

Video

Audio

PC Card

Motherboard

Speakers

Figure 3−4. Zoomed Video Implementation Using the PCI1510 Controller

Not shown in Figure 3−4 is the multiplexing scheme used to route a socket ZV source to the graphics controller. The

controller provides ZVSTAT and ZVSEL0

signals on the multifunction terminals to switch external bus drivers.

Figure 3−5 shows an implementation for switching between two ZV streams using external logic.

3−6

ZVSTAT

PCI1510

ZVSEL0

Figure 3−5. Zoomed Video Switching Application

Figure 3−5 illustrates an implementation using standard three-state bus drivers with active-low output enables.

ZVSEL0

is an active-low output indicating that the socket ZV mode is enabled.

3.5.4 Standardized Zoomed-Video Register Model

The standardized zoomed-video register model is defined for the purpose of standardizing the ZV port control for PC

Card controllers across the industry. The following list summarizes the standardized zoomed-video register model

changes to the existing PC Card register set.

• Socket present state register (CardBus socket address + 08h, see Section 6.3)

Bit 27 (ZVSUPPORT) has been added. The platform BIOS can set this bit via the socket force event register

(CardBus socket address + 0Ch, see Section 6.4) to define whether zoomed video is supported on the

socket by the platform.

• Socket force event register (CardBus socket address + 0Ch, see Section 6.4)

Bit 27 (FZVSUPPORT) has been added. The platform BIOS can use this bit to set the ZVSUPPORT bit in

the socket present state register (CardBus socket address + 08h, see Section 6.3) to define whether

zoomed video is supported on the socket by the platform.

• Socket control register (CardBus socket address +10h, see Section 6.5)

Bit 11 (ZV_ACTIVITY) has been added. This bit is set when zoomed video is enabled for the PC Card socket.

Bit 10 (STDZVREG) has been added. This bit defines whether the PC Card controller supports the

standardized zoomed-video register model.

Bit 9 (ZVEN) is provided for software to enable or disable zoomed video.

If the STDZVEN bit (bit 0) in the diagnostic register (PCI offset 93h, see Section 4.34) is 1b, then the standardized

zoomed video register model is disabled. For backward compatibility, even if the STDZVEN bit is 0b (enabled), the

controller allows software to access zoomed video through the legacy address in the card control register (PCI offset

91h, see Section 4.32), or through the new register model in the socket control register (CardBus socket address +

10h, see Section 6.5).

3.5.4.1 Zoomed-Video Card Insertion and Configuration Procedure

1. A zoomed-video PC Card is inserted into an empty slot.

2. The card is detected and interrogated appropriately.

3−7

There are two types of PC Card controllers to consider.

• Legacy controller not using the standardized ZV register model

Software reads bit 10 (STDZVREG) of the socket control register (CardBus socket address + 10h) to

determine if the standardized zoomed-video register model is supported. If the bit returns 0b, then software

must use legacy code to enable zoomed video.

• Newer controller that uses the standardized ZV register model

Software reads bit 10 (STDZVREG) of the socket control register (CardBus socket address + 10h) to

determine if the standardized zoomed-video register model is supported. If the bit returns 1b, then software

can use the process/register model detailed in Table 3−2 to enable zoomed video.

Table 3−2. Zoomed-Video Card Interrogation

ZVSUPPORT ZV_ACTIVITY ACTION

1 0 Set ZVEN to enable zoomed video.

1 1

Display a user message such as, The zoomed video protocol required by this PC Card application is al-

ready in use by another card.

0 X

Display a user message such as, This platform does not support the zoomed-video protocol required by

this PC Card application.

3.5.5 Internal Ring Oscillator

The internal ring oscillator provides an internal clock source for the controller so that neither the PCI clock nor an

external clock is required in order for the controller to power down a socket or interrogate a PC Card. This internal

oscillator can be enabled by setting bit 27 (P2CCLK) of the system control register (PCI offset 80h, see Section 4.29)

to 1b. This function is enabled by default.

3.5.6 Integrated Pullup Resistors

The PC Card Standard (release 7.2) requires pullup resistors on various terminals to support both CardBus and 16-bit

card configurations. Unlike the PCI12XX, PCI1450, and PCI4450 controllers which required external pullup resistors,

the PCI1510 controller has integrated all of these pullup resistors. The I/O buffer on the BVD1(STSCHG

)//CSTSCHG

terminal has the capability to switch either pullup or pulldown. The pullup resistor is turned on when a 16-bit PC Card

is inserted, and the pulldown resistor is turned on when a CardBus PC Card is inserted. This prevents unexpected

CSTSCHG signal assertion. The integrated pullup resistors are listed in Table 3−3.

Table 3−3. Integrated Pullup Resistors

SIGNAL NAME

TERMINAL NUMBER

SIGNAL NAME

TERMINAL NUMBER

SIGNAL NAME

PGE GGU GVF

SIGNAL NAME

PGE GGU GVF

A14/CPERR 102 D12 F15 CD2/CCD2 138 B05 C09

A15/CIRDY 110 C10 F13 INPACK/CREQ 122 B08 B12

A19/CBLOCK 101 A13 E18 READY/CINT 131 A06 C10

A20/CSTOP 103 E10 E17 RESET/CRST 119 D08 B13

A21/CDEVSEL 106 D11 A16 VS1/CVS1 130 B02 B10

A22/CTRDY 108 C12 E14 VS2/CVS2 117 A09 F12

BVD1(STSCHG)/CSTSCHG 135 C06 A09 WAIT/CSERR 133 B06 E10

BVD2(SPKR)/CAUDIO 134 D06 F10 WP(IOIS16)/CCLKRUN 136 A05 B09

CD1/CCD1 75 L13 L17

Part #	PCI1510GGU
Description	PCI TO PC CARD CONTROLLER - Trays
Category	IC
Availability	Out of Stock
Qty	0

PCI1510GGU

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Technical Document